Fix the race condition

[guedou]

Fixes #4546

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.62%. Comparing base (c38a5de) to head (4556f1a).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #4558   +/-   ##
=======================================
  Coverage   81.61%   81.62%           
=======================================
  Files         356      356           
  Lines       85540    85540           
=======================================
+ Hits        69816    69819    +3     
+ Misses      15724    15721    -3     

Files with missing lines	Coverage Δ
scapy/main.py	70.37% <100.00%> (ø)

... and 6 files with indirect coverage changes

[gpotter2]

This issue is a bit ridiculous. But alright.

[KepptnKool]

Will there be a patch level release containing the fix in the near future?